Home / 111,243.80-153,489.85-65,913.95

Finding the Fourth Proportional to 111,243.80, 153,489.85 and 65,913.95

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Solution

The fourth proportional to 111,243.80, 153,489.85 and 65,913.95 is: 90,945.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,243.80 : 153,489.85 = 65,913.95 : x
  2. Step 2: Convert to fraction form
    111,243.80/153,489.85 = 65,913.95/x
  3. Step 3: Cross multiply
    111,243.80x = 153,489.85 × 65,913.95
  4. Step 4: Simplify right side
    111,243.80x = 10,117,122,517.35
  5. Step 5: Solve for x
    x = 10,117,122,517.35/111,243.80
  6. Step 6: Final answer
    x = 90,945.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.